This clip is nothing short of an action movie trailer, no joke!
Here is what the Just Cause’s YouTube page had to say about the trailer–“Wingsuit, Grapple Hook, Massive Explosions: The first Just Cause 3 Gameplay trailer takes you straight into the intense action. Watch Rico Rodriguez cause chaos to the regime of the ruthless dictator General Di Ravello, and stopping at nothing to liberate Medici, his home.”
This footage is all actual gameplay. It was captured in-game using cinematic camera angles. It contains no cut scenes. Nothing was staged or scripted.